TY - JOUR
TI - Effect of surface emissivity on the radiative efficiency of divergent porous burner
AU - Yue Meng
AU - Li Zhuo
AU - Li Zunmin
AU - Yu Mengmeng
JN - Thermal Science
PY - 2026
VL - 30
IS - 2
SP - 1493
EP - 1503
PT - Article
AB - A 2-D numerical study is performed on a divergent radiant porous burner to study the surface emissivity, εr, on the radiative efficiency, η, and uniform distribution of heating temperature. It is shown that the εr has a significant impact on both the η and uniformity distribution of heating temperature over the whole investigation range for inlet velocity of 0.4-7.5 m/s and equivalence ratio range of 0.45-1.0. The η is always increased with the εr. For example, the η at an equivalence ratio of 0.75 and an inlet velocity of 1.8 m/s is increased from 0.0817-0.155 with εr. Meanwhile, a significant expansion of the upper limit of the modeled burner is validated, compared to the conventional one. The increased εr leads to the slightly narrower stability limit. Furthermore, uniform heating temperature is predicted over the whole investigation. The maximum root mean square of the heating temperature is in the order of 30 K. The divergent two-section porous burner achieves wider stability limits with comparable η compared to the conventional one.
DO - 10.2298/TSCI250612173Y
ER -